package com.huluobo.a2302mdmdemo.pages

import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.lazy.items
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.DisposableEffect
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.runtime.snapshots.SnapshotStateList
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.layout.ContentScale
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import androidx.navigation.NavHostController
import coil.compose.AsyncImage
import com.blankj.utilcode.util.TimeUtils
import com.google.gson.Gson
import com.huluobo.lib_base.RoutePath
import com.hyphenate.EMMessageListener
import com.hyphenate.EMValueCallBack
import com.hyphenate.chat.EMClient
import com.hyphenate.chat.EMConversation
import com.hyphenate.chat.EMGroup
import com.hyphenate.chat.EMMessage
import com.hyphenate.chat.EMTextMessageBody
import kotlinx.coroutines.launch
import java.text.SimpleDateFormat
import java.util.Date

/**
 *  Created by LC on 2025/7/22.
 */

@Composable
fun MessagePage(navHostController: NavHostController) {
    val allConversations = remember {
        SnapshotStateList<EMConversation>()
    }

    //控制接受消息时,重新读取会话列表
    var isLoad by remember {
        mutableStateOf(false)
    }

    //消息监听器
    val messageListener = EMMessageListener {
        //当接收消息的时候,重新出发获取会话列表
        isLoad = true
    }

    DisposableEffect(Unit) {
        EMClient.getInstance().chatManager().addMessageListener(messageListener)
        onDispose {
            EMClient.getInstance().chatManager().removeMessageListener(messageListener)
        }
    }

    LaunchedEffect(key1 = isLoad, block = {
        launch {
            allConversations.clear()
            allConversations.addAll(EMClient.getInstance().chatManager().allConversations.values)
            allConversations.sortedByDescending { it.lastMessage.msgTime }
            isLoad = false
        }
    })

    Column(
        Modifier
            .fillMaxWidth()
            .padding(20.dp)
    ) {
        Text(text = "消息", fontSize = 26.sp, fontWeight = FontWeight.Bold)
        Spacer(modifier = Modifier.height(10.dp))
        LazyColumn(content = {
            items(allConversations) {
                ConversationItem(emConversation = it, navHostController = navHostController)
            }
        })
    }
}

@Composable
fun ConversationItem(emConversation: EMConversation, navHostController: NavHostController) {

    var groupName by remember {
        mutableStateOf("")
    }

    if (emConversation.isGroup) {
        //通过会话的id查询群名字
        EMClient.getInstance().groupManager()
            .asyncGetGroupFromServer(emConversation.conversationId(), object : EMValueCallBack<EMGroup> {
                override fun onSuccess(value: EMGroup?) {
                    if (value != null) {
                        groupName = value.groupName
                    }
                }

                override fun onError(error: Int, errorMsg: String?) {
                }
            })
    }

    Row(
        verticalAlignment = Alignment.CenterVertically,
        horizontalArrangement = Arrangement.spacedBy(10.dp),
        modifier = Modifier
            .fillMaxWidth()
            .padding(10.dp)
            .clickable {
                //标记当前会话中所有的消息为已读
                emConversation.markAllMessagesAsRead()
                if (emConversation.type == EMConversation.EMConversationType.Chat) {
                    val chatBean = ChatBean(emConversation.conversationId(), EMMessage.ChatType.Chat)
                    val json = Gson().toJson(chatBean)
                    navHostController.navigate(RoutePath.CHAT + "/$json")
                } else {
                    val chatBean = ChatBean(emConversation.conversationId(), EMMessage.ChatType.Chat, groupName)
                    val json = Gson().toJson(chatBean)
                    navHostController.navigate(RoutePath.CHAT + "/$json")
                }
            }) {
        AsyncImage(
            model = "https://img0.baidu.com/it/u=788800651,2030194952&fm=253&app=120&size=w931&n=0&f=JPEG&fmt=auto?sec=1730307600&t=9c17b588a934b0ccf76349e5e5b7ca08",
            contentDescription = "",
            modifier = Modifier
                .size(40.dp)
                .clip(RoundedCornerShape(5.dp)),
            contentScale = ContentScale.Crop
        )
        Row(modifier = Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.SpaceBetween) {
            Column(Modifier.height(50.dp), verticalArrangement = Arrangement.SpaceAround) {
                if (emConversation.isGroup) {
                    Text(text = groupName)
                } else {
                    Text(text = emConversation.conversationId())
                }
                Text(text = (emConversation.lastMessage.body as EMTextMessageBody).message, color = Color.LightGray)
            }

            Column(modifier = Modifier.height(50.dp), verticalArrangement = Arrangement.SpaceAround, Alignment.End) {
                //今天的日期
                val today = SimpleDateFormat("yyyy-MM-dd").format(System.currentTimeMillis())

                //最后一条消息的日期
                val date = TimeUtils.date2String(Date(emConversation.lastMessage.msgTime)).substring(0, 10)

                //最后一条消息的时间
                val time = TimeUtils.date2String(Date(emConversation.lastMessage.msgTime)).substring(11, 16)

                //如果日期是今天,则显示时间,否则显示日期
                if (date == today) {
                    Text(text = time)
                } else {
                    Text(text = date.substring(5, 10))
                }

                if (emConversation.unreadMsgCount > 0) {
                    Text(
                        text = emConversation.unreadMsgCount.toString(),
                        color = Color.White, modifier = Modifier
                            .background(Color.Red, CircleShape)
                            .size(16.dp),
                        fontSize = 10.sp,
                        textAlign = TextAlign.Center
                    )
                } else {
                    Text(text = "")
                }
            }
        }
    }
}